CVE-2025-23817
📋 TL;DR
A Cross-Site Request Forgery (CSRF) vulnerability in the MHR-Custom-Anti-Copy WordPress plugin allows attackers to perform stored cross-site scripting (XSS) attacks. This affects WordPress sites using vulnerable versions of the plugin, potentially compromising site visitors and administrators. Attackers can inject malicious scripts that execute when users visit compromised pages.
💻 Affected Systems
- MHR-Custom-Anti-Copy WordPress Plugin
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Attackers could inject persistent malicious scripts that steal session cookies, redirect users to phishing sites, or perform administrative actions on behalf of authenticated users, potentially leading to complete site takeover.
Likely Case
Attackers inject malicious JavaScript that steals user session cookies or redirects visitors to malicious sites, compromising user accounts and site integrity.
If Mitigated
With proper CSRF protections and content security policies, the attack surface is reduced, but the vulnerability still exists in the codebase.
🎯 Exploit Status
Exploitation requires tricking an authenticated user into visiting a malicious page while logged into the WordPress admin panel. The CSRF leads to stored XSS payload injection.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Versions after 2.0
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Locate 'MHR-Custom-Anti-Copy'. 4. Click 'Update Now' if available. 5. If no update is available, deactivate and delete the plugin immediately.
🔧 Temporary Workarounds
Implement CSRF Protection
allAdd CSRF tokens to all form submissions and AJAX requests in the plugin code
Content Security Policy
allImplement a strict Content Security Policy header to mitigate XSS impact
Header set Content-Security-Policy "default-src 'self'; script-src 'self' 'unsafe-inline' https:;" in .htaccess or server config
🧯 If You Can't Patch
- Deactivate and remove the MHR-Custom-Anti-Copy plugin immediately
- Implement web application firewall rules to block CSRF attempts and XSS payloads
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Installed Plugins for MHR-Custom-Anti-Copy version 2.0 or earlierCheck Version:
wp plugin list --name=mhr-custom-anti-copy --field=version (if WP-CLI installed)Verify Fix Applied:
Verify plugin version is higher than 2.0 or confirm plugin is completely removed from /wp-content/plugins/ directory📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to WordPress admin-ajax.php or admin-post.php endpoints
- JavaScript injection patterns in plugin-related database entries
Network Indicators:
- CSRF attack patterns with missing referrer headers or nonce tokens
- Unexpected iframe or script tags in HTTP responses
SIEM Query:
source="wordpress.log" AND ("admin-ajax.php" OR "admin-post.php") AND (POST) AND NOT (referer="*wp-admin*")